Kazuna's family has a history of suffering from a disease that creates an uncontrollable vampire-like thirst for blood. Knowing none of this, Kazuna was sent to live with the Eda couple as a child. As the sickness begins to show signs of being present within himself, he comes into contact with his older sister, Chizuna, who has been suffering from it since early childhood. Knowing that the sickness incurs a heavy weight upon those that suffer from it, Chizuna tries to ease her brother's burden, to help him learn to control his urges, but...

San and Mayu are two schoolgirls living in Okinawa during the closing months of the Pacific War. Together with their classmates, the two friends are drafted into the war effort as nurses for wounded soldiers. When ordered to die for their country, the remaining members of the group escape only to face the harsh environment of a tropical paradise that has become a hellish battlefield.

In a future to come humanity enjoys a new age of prosperity thanks to Dr. Shizuma's invention of a revolutionary renewable energy source: the Shizuma Drive. But this peace is threatened by Big Fire, a cabal seeking world domination. Against Big Fire the International Police Organisation dispatches a collection of superpowered warriors and martial artists, together with Daisaku Kusama, inheritor and master of Earth's most powerful robot, Giant Robo. By capturing an abnormal Shizuma Drive which is essential to Big Fire's plans the IPO ignites a desperate conflict between the two groups. The coming battle will test Daisaku's resolve to the utmost, reveal the ghastly truth behind the creation of the Shizuma Drive, and bring human civilization to its knees! Giant Robo is a character-driven adventure in a retro-futuristic setting, drawing on influences from opera, kung-fu cinema, wuxia stories and classic mecha anime. It incorporates characters from the works of the manga author Mitsuteru Yokoyama but it is designed to be a stand-alone story.

Following the awakening of her Dream-Sight ability, Miyo Saimori reunites with her fiancé, Kiyoka Kudou, the captain of the special forces protecting the country against ill-intended individuals gifted with exceptional powers. However, the couple's blissful life is suddenly interrupted when Takaihito, the top contender for the imperial throne, sends Kiyoka on a dangerous mission. Traveling with Miyo to the remote household of his parents, Kiyoka must investigate unusual reports of demons in the region. Meanwhile, Miyo tries to gain the approbation of her callous mother-in-law, Fuyu, who refuses to recognize her as a family member. After Kiyoka repels an attack by the Gifted Communion, a subversive sect of special abilities wielders, he returns to the capital alongside his fiancée. As the looming threat against the imperial authority intensifies, Kiyoka must thwart the Gifted Communion's plans to protect Miyo and everyone he holds dear.